DV is short for Digital Video, translated into Chinese is Another spray valve, digital voltage source, such as the English acronym, and other meanings.
directory
Common Definition digital video camera digital video camera DV Introduction to the course of development works by the memory storage format to use storage media-use classification by sensor type and number of categories classified by common troubleshooting methods Note buy ten items of household routine maintenance of common problems of other anti-star nickname meaning of domestic violence Deluge Valve path vector digital voltage source referred to the definition of DV is a common abbreviation in English Digital Video, a digital camera
digital camera
meaning. DV can also be translated as jointly developed a digital video format. However, in most situations it is representative of DV digital camcorder. Digital video digital video refers to the digital information recorded video data. The corresponding English phrase is Digital vid
SD card as storage media using a Canon camera
eo. But English Digital video also tend to refer to digital video capture device or system. And a corresponding digital video analog video, such as ordinary (analog) TV. Digital video is usually recorded on tape, usually through the CD, especially the DVD to release. There are exceptions, some of the new camera can record video content will be collected on the DVD or hard disk. Digital8 camcorder with digital video recording in the usual analog tape. Video cameras Video cameras usually have two different video capture formats: interlaced scanning and progressive scanning. Interlaced image when the camera scans every line of scan line: while the odd lines are scanned images, and then at a certain time interval scans the even lines of the image, then the odd lines, then the even lines ... contains only odd rows of image and the image contains only the even lines is known as field, adjacent to a dual two form an odd one. Similarly, for interlaced images, each image with all the scan lines is also called a frame. If the interlaced images to progressive-scan images and to maintain the same frame rate, interlacing, when collecting the number of times per second need is to collect twice as progressive scan. If you look at the video interlaced still images, then, very easy to find two different time because the fault lines caused by distortion of acquisition, this time is necessary to use de-interlacing (or de-interlacing, deinterlacing) approach to address this distortion. Usually, if it is the same size produced the same image, then the frame rate, progressive scan camera than the interlaced scanning is much more expensive camera. The standard film frame rate is usually 24 frames per second, 16 mm film and 35 mm film. In the United States to use NTSC, digital video camera frame rate is 29.97 per second (more accurate figure is 30/1.001) frames; in Europe PAL, digital video camera frame rate is 25 frames per second. As most of the camera is used in interlaced mode, so the number of frames per second, referred to here is not accurate to say that. Better than the 29.97 frames per second, say 60 per second (59.94) field, so every time interval between the two is about 1 / 60 seconds. If the digital video has remained in the same format (without re-compression - sometimes for video editing, publishing often do, but also including some use of lossless compression of video codec status), digital video would be a lossless format. This is in contrast in terms of analog video - to the analog video reproduction, transmission or playback will result in quality loss; and digital video, even if you copied 10,000 times, it's exactly the same quality and original. So more and more analog video is converted to digital video to store. But doing this conversion, because of the speed of some of the video capture card or a computer fast enough, may cause the time frame dropping collection situation. This time is usually a subjective quality point of view the video could not see any difference, but sometimes there with Kaka audio sound, the user noted that, especially when the processing of music. Therefore, in this transition time, we must use the equipment fast enough. Digital video editing is usually done by non-linear editing (NLE for non-linear editing) systems carried out. This system is designed for video and audio editing and design, often it can be poured into the analog or digital video / audio source, but in addition to editing than it usually does not do anything. You see almost all the TV shows, some movies, ads are produced by nonlinear editing systems. Now, you can personal computer digital video editing, typically requires a certain hardware (such as IEEE 1394 interface card, fast enough CPU, enough hard disk), and certain software (such as Avid, Adobe Premiere, Final Cut Pro , iMovie, MGI Videowave, Video Toaster, vivid, etc.). More and more people use computers to produce their own their own little movie. Than 35 mm film, digital video, much lower cost, especially in the editing time. For example, you want to cut out a scene in 35mm film, then the photographer and the director needs to very carefully - because once an error during this scene perhaps scrapped. Rechargeable digital video with ###### is a big advantage. Low-cost digital video personal video recording also makes it possible. For example, when using the 35mm film to shoot a movie usually takes thousands of dollars, if you use digital video, perhaps as long as hundreds of dollars, even though the video did not use any part of the charge. Use of digital video work much faster than using film more, because digital video can then immediately watch the film without the need for flushing process. For these reasons, more and more films began to use digital video capture and processing, such as Star Wars. Digital video is not just for film production. Since 2000, in most developed countries, digital television, including the growing popularity of high definition television together. In narrowband applications, for mobile phone video communications, and commercial video telephony, video conferencing has a mature product. On the Internet, streaming video and video transmission point are also recent hot spots. There are many different digital video coding and file container format that supports different sizes, quality, resolution, color accuracy and image coding encoding. Until 2005, the highest-resolution digital video presentation is 33 megapixel resolution, the 7680 x 4320, 60 frames per second frame rate - known as the UHDV, although only in exceptional carried out under laboratory conditions , see [1]. 1024 x 1024 resolution at the highest frame rate has reached 1 million per frame (of course, is in a very short period of time), which is used in industry to achieve high-speed video camera. Introduction to digital cameras and digital camera video camera one of the biggest traditional distinction is that it can have a timely view pictures
HD Home Basic dv
screen, called the digital camera display, the general structure of the liquid crystal (LCD , called the Liquid Crystal Display). Currently the size of the digital camera LCD screen of 2.5 inches or 3.0 inches. Digital cameras are commonly used in TFT-type LCD, TFT in the end what is it? First, it includes a polarizer, glass substrate, thin mode transistor, alignment film, liquid crystal materials, guide plate, color filter plate, fluorescent tubes and so on. For the liquid crystal display, backlight is the light emitted from the fluorescent tubes, the light will go through a polarizer and then through the liquid crystal, when the arrangement of liquid crystal molecules and thus change the angle of light through the LCD. In the use of LCD, we found that different angles will see different colors and contrast degrees. This is because most of the light emitted from the screen vertically. If from a very oblique angle viewing of a full-white screen, we may see a black or color distortion. LCD digital camera is very expensive and fragile, so users must be careful when using, but usually need to do maintenance work. And compared to analog cameras, DV has the following outstanding features: high-definition. We know that the mentioned analog cameras recording the analog signal, so the image resolution (also called resolution, resolution, or resolution) is not high, such as the level of VHS video camera with 240 clear the main line, and only the best models provide Hi8 400 lines. The DV recording is the digital signal, the horizontal resolution has reached 500 to 540 lines can be comparable to professional cameras. Colors more pure. DV's chroma and luminance signal bandwidth is almost 6 times the analog cameras, and color
DV
and the brightness of the bandwidth is to determine the image quality is one of the most important factor, and thus the color of DV video captured the more pure and beautiful, but also to reach a professional level camera. Lossless copy. DV tape recorded signal can be transcribed countless times, image quality did not drop, which is also analog cameras can not. Small size and light weight. And compared to analog cameras, DV unit volume greatly reduced, generally only about 123mm × 87mm × 66mm, weight is significantly reduced to only 500 grams, which greatly facilitates the user volume is only 74.7mm × 61.9mm × 26.9 mm, weighing only 90 grams lighter than most mobile phones even more. In the video, the user viewing the LCD screen through the DV to capture the moving image, you can immediately see the film after shooting a good moving image. DV able to shoot through to the moving image is converted to digital signals, together with the microphone signal with the recorded sound stored in the DV zone. DV can be connected to a computer to read with the contents of the DV, then the contents of these post-processing, such as editing, can also be carved into VCD or DVD saved. DV can also be connected to a TV, not only can be read on the TV with the contents of the DV, but also recording TV programs. DV pixel is the most important technical indicators. The higher the pixels, the higher the image resolution. DV lens with CCD and COMS distinction. Course of development from birth to the first digital camera in 2008, has 13 years, and in these 13 years, tremendous changes have taken place in digital cameras, storage media from DV to DVD to another disk, the total pixels from 800000-400 million, the image quality from standard definition DV (720 × 576) to high-definition HDV (1440 × 1080), have occurred in these 13 years. In 1995 the birth of the first DV camcorder in July 1995, Sony released the first release DCR-VX1000 DV camcorder, DCR-VX1000, once launched, he incurs the world television news reporter, producer widely used, this product Mini -DV tape format, with 3CCD sensor (3 1 / 3 inch, 41 million pixel CCD), 10 optical zoom, optical image stabilization system, the release price of up to 4,000 U.S. dollars. DCR-VX1000 is the image in the history of a major change, since then, consumer digital cameras started to enter the digital age. In 2000 the birth of the first DVD camcorder in August 2000, Hitachi introduced the first DVD Camcorder DZ-MV100. This product can only be used when DVD-RAM recording, the first time Hitachi DVD as storage media into the digital camera to use the DVD-RAM 8cm discs as storage media, out of all the inconveniences DV tape, is the second After the DV camera is a great innovation, but how many people did not pay attention to this product, DZ-MV100 is only sold in Japan, the domestic market, hard to find, DVD camcorder wide recognition from the 3 years was to promote the beginning Hou Suoni . 2004 Birth of first micro hard drive camcorder in September 2004, JVC introduced the first 1 inch mini hard disk video camera MC200 and MC100, the hard disk started to enter the field of consumer digital cameras, two hard disk recording capacity of 4GB, video images taken MPEG-2 compression used, the user can change the compression rate flexibility to extend shooting time, hard disk media used to exchange information on digital cameras and computers became very convenient,
cheap paul smith, MC200 and MC100, and several one inch beyond micro hard drives can be flexible and change the camera Micro hard drive. To June 2005, JVC announced a large-capacity 1.8-inch hard drive with Everio G Series cameras, the maximum capacity of a 30GB, and good control of the volume, prices remain at the same DV camera level. In 2004 the first birth of HDV 1080i HD camera in September 2003, Sony, Canon, Sharp and JVC developed jointly by four giant high-definition video standard HDV, 2004 年 9 months, Sony released the first HDV 1080i high-definition camera HDR-FX1E , HDV records a resolution of 1440 × 1080, horizontal scan lines than the DVD more than doubled, to enhance clarity be revolutionary, HDR-FX1E including HDV cameras introduced after the original DV tapes are in use, but still support the DV format shooting, backward compatible, within the HDV camera to promote the early transition from a good role. Digital camera works on the basic principle simply means that light - electricity - the transformation and transmission of digital signals. Through the light sensor signal into a current signal into analog and then digital signal processing by a dedicated chip, and filtering the information obtained to restore it is what we see a dynamic picture. Digital camera sensor can light into electric charge, through the ADC chip into a digital signal, there are two kinds: one is the widely used CCD (charge-coupled) components; the other is CMOS (complementary metal oxide conductor) devices. DV store today with the high-definition video continue to emerge DV, DV-capacity storage media has become a topic of concern to most people so that pop up almost overnight on the market a lot of DV, the biggest difference between the DV storage medium may be used in different, although the capacity of the size of the points, but there are advantages and disadvantages exist with each other, then let the following simple analysis of the author give you to the next.
using the JVC hard drive as storage media the camera
now on the market in accordance with the above DV hard disk storage media can be divided into categories about the disc type, DV with a class, memory cards these four categories. First, let's talk about the hard drive DV. Drive the market above the main DV DV to JVC brand, mainstream capacity 20-60GB, DV hard drive storage space advantage is that large, can easily store the recorded programs to your computer or directly supporting DVD burning device disc carve, but such machines also have their weaknesses, that is, when in actual use if the hard disk can not be replaced after completing filming other media continue to film, while the use of a hard disk drive DV, so the machine can not drop the kind of situation occurs Otherwise, the machine is likely to direct reimbursement, the hard disk inside the data will all be reimbursed, so the purchase of such machines in use as a storage medium
using the Panasonic DVD video camera
when we must pay attention. CD media products are the most Jingui a class of products, but also the most convenient one class of machine. Said that because he was convenient DV discs using DVD media disc as a storage medium, the time when the end of the shoot, simply remove the DVD directly to a DVD in any player for playback. But this is convenient, but there is a certain image quality compression, and optical storage media, relatively short life, so everyone should be balanced when buying it. DV with a media do not need to introduce more products, the author, the advantage is cheap, and you could buy, but the disadvantage is that the tape kept short and they shoot the video export computer slow, very accurate. But for junior players, the development of such machines has matured, the host of the price
use DV as a storage medium with a Panasonic video camera
product line of all the most expensive. Memory card media products are generally focused on the use of cheap SD card, with the escalation of the capacity of SD and SDHC memory cards appear standard, SD card capacity has been a GB level to the N direction, and this development also The trend continues to spread. Compared to other storage media card, the most compact size of such machines to carry the most convenient, the disadvantage is a comparison of costs of electricity, standby time is short, the lens performance in general. Storage format CCIR 601 encoding is widely used in television broadcasting; MPEG-4 is the video for online publishing; MPEG-2 used in DVD and SVCD; MPEG-1 VCD in use; H.261 video phone use and video conference; H.263 used in video telephony and video conferencing; H.264 is MPEG-4 Part X, or AVC. Has a very wide range of applications.
DV tape with
Betacam SX, Betacam IMX, Digital Betacam; D1, D2, D3, D5, D9 (aka Digital-S); DV, MiniDV - used in most consumer cameras are now in; DVCAM , DVCPRO - used in professional broadcast equipment; Digital8 -. Category 1 by the intended use, broadcast-level models: These models are mainly used in the field of radio and television, image quality, overall performance, but the price is high, the volume is relatively large, their highest resolution, the maximum signal to noise ratio, the best image quality. Of course, the price of several hundred thousand dollars is not acceptable to most people got the. For example, more than Panasonic's DVCPRO 50M models and so on. 2, professional models: These models typically used in broadcast television outside the professional TV areas, such as EDUCATIONAL other, image quality is lower than broadcast video camera, but in recent years, some high-end professional camera has a lot of performance indicators more than the old model of broadcast cameras, prices are generally caused tens of thousands more than ten million. Relative to the consumer model, the professional DV not only looks cool, even from the eyes, but also in the configuration to be much higher, such as the use of better quality performance of the lens, CCD and other relatively large size, in the imaging quality and adapt to the environment is more prominent. Image quality for the pursuit of friends, the image quality improvement brings the surprise is not at can be measured by money. Representative of models such as Sony's DVCAM series models. 3, the consumer-level models: These models are mainly used for home video camera, image quality, less demanding applications in the non-business situations, such as home entertainment, small size and light weight of these cameras, portable, simple operation, cheap. In less demanding situations can use it to create individual family of VCD, DVD, prices generally several thousand dollars to million level. If the home digital video camera then fine, then the classification can be divided into the following categories: entry-DV, DV mid-and high-end consumer DV standard of professional products. Category 1 by the storage medium, tape-style: refers to Mini DV digital video camera to record the media, it is the first in 1994 by more than 10 manufacturers to jointly develop
DV
made. By 1 / 4 inch metal evaporated brought record high quality digital video signal. 2, CD-style: refers to the DVD digital video camera, storage media is the use of DVD-R, DVR + R, or DVD-RW, DVD + RW to store motion video images, simple, easy to carry, do not worry about shooting in the overlap shooting, not a waste of time to rewind or playback, in particular through the DVD player directly play instantly, eliminating the need for post-editing of trouble. DVD media is the medium of digital cameras in all security, stability, the highest, not as easy as the loss of DV tape, but also not as hard on the shock-type DV has a very stringent requirements. The downside is that DVD discs are slightly higher compared with the DV tape a little, but also burn a number of relatively short time. 3, the hard drive: refers to the use hard disk as a storage medium of digital cameras. First introduced in 2005 by the JVC, with micro hard drives for storage media. Hard drive camcorder has a lot of good, high-capacity hard drives to ensure long shoot camera, so you travel there will be no worry about shooting. Transmitted to the computer at home film material, and no longer need to MiniDV tape, as cumbersome camera era, professional video capture device, only application connected to a computer USB connection, you can easily export the finished material, so that the average home user can easily experience shooting, editing video movie fun. Micro hard drive size and CF card, and DVD discs are smaller than, the use of time is the most significant number of storage media, but the hard drive-based DV production time is not long, but also the disadvantages of the presence of more or less : poor performance, such as earthquakes and so on. As prices decline further in the future people will inevitably increase demand. 4, storage card: refers to the memory card using a digital camera as a storage medium, such as the rage of the By sensor type and number of Category 1, sensor type: CMOS and CCD CCD: charge coupled device image sensor (Charge Coupled Device), using a high sensitivity of the semiconductor material, can light into electric charge, through the module converter chip into a digital signal. CMOS: Complementary Metal Oxide Semiconductor (Complementary Metal-Oxide Semiconductor) and CCD digital cameras like the same as the light changes can be recorded in the semiconductor. In the same resolution, CMOS cheaper price than CCD, but the image quality produced by CMOS devices is to be lower than CCD. So far, the vast majority of the market and the high-end consumer-level digital cameras use CCD sensors as; CMOS sensors are used in some low-end products as the camera head, but some high-end products, also used a special CMOS As a light sensor, for example, several high-end Sony's CMOS models. 2, the number of sensors: a single CCD image sensor is the number with 3CCD digital video camera that is sensitive CCD or CMOS device number, the majority of digital cameras
digital camera
using a single CCD as its light-sensitive devices, and some high end 3CCD digital video camera is used as the light-sensitive devices. Single CCD is a CCD camera, only the brightness and use their signals and color signals of the photoelectric conversion. Since a CCD while the luminance signal and chrominance signals to complete the conversion, so the images taken out of reach in the color reproduction on high demand. The name suggests is a 3CCD camera using three CCD. We know that, if the light through a special prism, will be divided into red, green, and blue, which is our TV uses three colors of the three primary colors, through the three primary colors, including the luminance signal can be generated including all television signals. If you were to accept each with a color CCD and converted to electrical signals, then processed through the circuit produce an image signal, so that to form a 3CCD system, the almost intact display color images, the camera will not be through interpretation of the situation arising from color errors. Troubleshooting digital camera fault phenomenon are manifold, models for different problems, specific methods of its solution will have some minor differences. To sum up, but nothing more than the following categories. 1, the camera image when the income poor. This failure generally can be divided into three cases, one is shown in the viewfinder image and the TV is not ideal, leading to the reasons for this failure is usually in the camera circuit; Second, the viewfinder image normal and the TV show bad image, in which case AC adapter or failure is usually caused by poor line connection; third is the TV image viewfinder image normal and bad reasons for this failure is usually caused by a viewfinder. 2, the image color is not natural. If the tape monitor records the image normal and five color or color negative, in general, failure occurred in the video section: On the contrary, if the tape recording monitor image is not normal and normal, was caused by AC adapter or a bad connection. If both are negative, the fault in the camera circuit. 3, image blur, focus is not good. If the manual focus well and auto-focus poor, often malfunction in the automatic focusing circuit. If the manual and automatic focus are bad, the fault component, mainly in the lens focus. 4, no audio playback images. In such cases, can be taken with a tape recorder into the common normal replay, monitor sound effects. If the sound normal, the fault in the AC adapter; the other hand, failure in the audio and microphone recording microphone circuit or circuits. 5, the machine does not work. After booting the keys had no role in the viewfinder no light, the box body does not work. Such power failures are usually caused by abnormal or power circuits. Should first check the battery voltage or AC AC adapter output voltage is normal, if normal then the fault in the power circuit. 6, tape handling failure. Viewfinder and monitor can be displayed the image when shooting, but the tape is not loaded into or take it out. Such failure generally occurs in the movement and its drive circuit. Failure phenomenon based on the preliminary examination methods to determine the fault location, the next point of failure should be further in-depth search. Structure of the integration of sophisticated digital cameras, many components, so in order to find the fault as soon as possible, the search was impossible to test components individually. To this end, can make use of electronic equipment in the following way to find out. 1, the comparative method. The normal equipment and faulty equipment to be compared, and then find out the fault. Can make use of test equipment associated with test points on the voltage, current, resistance, and waveforms were compared, can quickly search to the exact point of failure. 2, the displacement method. Borrowed parts of the normal replacement of equipment failure on the suspicious device components to quickly find the failure. This method can be easily used in the replacement of the circuit board or connectors. 3, the points system. Search Select a partition testing when the fault coverage point is divided into two parts, and through the failure of the test points to determine which part of the range in which the. Then the failure to determine the range from the Select a partition test point, the range will be further divided into two parts failure, and through the test site to further determine the fault coverage, and so on, fault coverage shrinks rapidly, and can quickly find the point of failure . 4, open circuit and short circuit. Circuit when the fault tracing method used, tend to have a multiplier effect. It should be noted that the open circuit and short circuit method is not suitable for certain circuits, such as high-voltage power circuit and the circuit is not short circuit. 5, the human body sensor method. Search the use of human failure, the most convenient source of noise into the noise signal to the test point is often the method used. This method is simple and rapid characteristics, but must pay attention to safety, to prevent accidental touch pressure points. Note 1. Image quality is very important when purchasing specifications. Video camera image resolution refers to the level of resolution as a yardstick. The more lines, the image clearer. 2. Zoom performance camera represents the flexibility is another important indicator. Optical zoom lens focal length by the change to zoom, better, buy the bigger the better, of course multiplier, usually several times optical zoom ratio to 20 times in between, some models of camera can also double the optical zoom lens to increase magnification . 3. How many functions are also an important indicator of the camera purchase. In addition to the clock settings, various operating settings and other essential functions, as well as picture effects, digital editing, fade, etc. are almost all models is necessary for the camera. Optional items 1.CCD CCD pixels is a measure of image quality of digital cameras is an important indicator of the size of pixels of images taken directly determines the clarity, color, and fluency. Pixel CCD digital camera is basically determines the grade, it is generally in the mid-range 800,000 to 1,000,000 pixels, while the high-grade are generally more than 120 million pixels. CCD is an important indicator of the area, the small size of the CCD image quality is relatively vague, but also the richness of color reproduction is poor, but the area is also used in image stabilization is much smaller, then the anti-shake feature, of course also some of the weaker. Currently on the market Sony, Samsung and other brands have more than 120 million pixels, the product launch. Of particular concern is the Samsung D93i, D99i Series DV, 1 / 4 英寸 1.33 million pixel CCD for image clarity and color more full. 2. Lens with digital cameras, digital camera lens imaging quality of the decision is an important factor. First look at optical zoom lens, this means that the optical zoom, optical zoom larger size can be a scene we shot the greater the degree of choice, when the composition of our film will bring great convenience, this and the camera's zoom lens is the same reason; the second is the lens aperture, if the diameter is small, then even if another big pixels, in the light darker shooting cases, to no good effect, that is, it will become a digital camera Imaging of a bottleneck. Samsung New D10xi, D30xi series optical zoom of up to 20 times, the lens diameter 30mm (some models on the market than the width of a 5mm), play can be easily distant objects closer, shot to a clear picture. 3. Shape and size of camera buyers are generally used with entertainment in nature, it is necessary to consider the shape. Another is the volume of home when the camera is generally in carrying out, so small and it is very necessary and most importantly, take up any position can be used instead of the stations were limited due to the shooting angle. Samsung recently introduced 10 new products, the volume than previous products decreased by 15% -20%, more compact body, small, easy to carry out. 4. An easy convenience for ordinary consumers, ease of operation is a necessary condition for election machines. The Samsung Q Series DV-specific features simple and easy navigation knob, so that ordinary consumers will soon be able to skilled operators. Simple Q function can ensure that users can shoot in any conditions the same wonderful picture. Easy to use Q function, the user simply press the Easy Q button and everything is solved. Easy navigation buttons feature allows you to quickly and easily find the most commonly used functions. Knob down to the implementation of manual / auto focus, shutter speed / exposure, white balance, digital stabilization, etc. 8 functions. Samsung Digital Camera new specially designed close to the bilingual menu, make operation more convenient. 5. Compatibility wonderful picture of life often have to share with friends, but if different is not compatible with the camera's memory card that is more disappointing. That is visible on the market MS, MSPro, SD, MMC four cards, a high degree of compatibility for video and audio transmission between the different cameras possible. DV unit is compatible with four types of cards, this feature is unique to Samsung, some new. 6. LCD display professional who often shot, the composition has Bijiao Shu, and can not display, but in general most users take when using the LCD screen. In fact, the LCD did not make any profound whatever, is mainly to be sufficiently high brightness, the pixels should be large enough, there is an area the bigger the better, more popular now is 2.5 inches and 3.5 inches. If you use a light reflective liquid crystal display, time framing the face of the sun can also be clear, no longer troubled by the fear of a blank screen. Ten anti-travel, whether domestic or family gatherings, the frequency of use of digital cameras are very high. How to care and maintenance of the machine became very concerned about the majority of users. Notes on the maintenance, use the instructions usually have a brief description, but for maintaining complete control of the user knowledge is not enough. The camera code 1, anti-glare do not put a strong camera lens at the sun or other strong light sources, because the light will burn the camera tube. Great moments in the sunrise and sunset, or with cloud cover, blocking most of the leaves when the sun, allowing the sun for too long to shoot. Do not let the sunlight directly fired into the viewfinder, because the light will damage the viewfinder screen. When using lighting, camera and lighting should be sufficient distance to prevent direct exposure to strong light on the camera. Stop using the camera, you should immediately turn off the power, into the bag, to avoid exposure to light. 2, anti-high temperature and digital cameras use charge-coupled device CCD, which limited the ability of high temperature, it can not with a digital camera directly to the sun or take a very strong light, otherwise a serious on the image of the vertical smear, so that affected the quality of filming, special needs or can not be taken as short as possible to avoid when you have time. Digital camera for a long time by the strong light or heat will cause the shell deformation, so when in use and storage of the machine to be careful not to put long hours under bright light exposure, and do not place the machine near heating ducts or heating equipment. Also, do not forget the camera in the sunny hot car. If the camera had to drying in the sun, use a piece of colored sand and avoiding a towel or foil to block the tool mounted to the dark. 3, anti-camera only to adapt to low temperature 0 ℃ ~ 40 ℃ in temperature between the inside work. At low temperatures proof measures should be taken. We can be hidden in the pocket of the way the camera to the camera to maintain appropriate temperature, but also to carry a spare battery, because the cameras at low temperatures may stop working, which seems to give the car in cold weather as warm. When the machine from a cold place to get a warmer room, or machinery in the workplace humidity exceeds a certain value, the drum surface will be sticky because of condensation, this time if the boot work, the tape will be attached to the magnetic drum. As the relative speed between the tape and head movement, then it is easy to damage the heads and tape, and likely to cause malfunction. Therefore need to use newspaper or plastic bags wrapped the camera until the camera when the temperature rose to room temperature before use. 4, waterproof digital camera if the storage or work in high humidity environment, not only likely to cause circuit failure, and the camera lens is easy to mold. Video head wear parts is to be changed regularly. However, in addition to the life of video heads the materials depends on the head, but also with the use of the environment is closely related to air humidity, air humidity, the greater the faster the video head wear. Under normal circumstances, the work head relative humidity of 40% in the longest time, up to 1000 hours. If you are not careful in the use of water splashing, pour into coffee or drinks or even falling and we should immediately turn off the power, then wipe the body of water damage, and then blowing the rubber ball will spray all parts of a slit, and finally and dried a few hours later, then test whether the camera has failed. Note: Do not rush to start testing immediately, otherwise the camera may cause a short circuit. Summer, when the camera removed from the air-conditioned room to a place without air conditioning when the temperature is high, the temperature difference will make the camera look very In a few hours before extraction of the camera, the indoor air-conditioning off, so that temperature rise, and the chassis cover open. 5, shock proof digital camera is an optical touch device, but also a sophisticated machinery and equipment, any kind of vibration particularly severe vibration, collision will produce damage to equipment. Any digital camera image quality of electronic devices and an important component of the decision by the shock injury will seriously affect the operation of digital cameras. Therefore, the shooting hand do not leave machine or machines leave the body, to ensure that the camera will not crash into a hard object or a fall, not when the best set of camera or camera bag in the back. 6, anti-corrosion chemicals away from the digital camera should be, when a number of chemicals produced in the plant or where a large number of smoke when shooting, should be wrapped in plastic bags, exhausted after a while on the air at the time of blowing. Cleaning the camera, only with a dry, soft cloth, or wet with a soft cloth Some soft detergent, rather than using alcohol, a class of petroleum ether solvent liquid, as they will corrode the camera housing, there damage the machine looks perfect. 7, to avoid the dust and smoke and storage of digital video camera should work in a clean environment, this can reduce the external dust, dirt, soot and other pollution caused by the possibility of failure. Because the fumes, dust, etc. into the machine's camera lens will affect the clarity of the future and increase the adjustment of the inertia switch and knob. In addition, when a relatively high speed with the tape head when the head or fall on the dust on the tape will be like sand - like the head and tape damage. Outdoor open areas, sand will be more shooting, and may even have strong winds, the wind easily scratched into the camera lens or the focus ring, and other mechanical devices to cause injury, so should be kept outside in addition to being shot with the lens cap cover live in large areas of sand is best to remember to bring camera jacket. 8, magnetic digital camera is one of precision optical equipment, photoelectric conversion is the main working principles, key components such as CCD, DSP chips are sensitive to strong magnetic and electric fields, they will affect the advanced features that the normal performance of these components play a direct impact on shooting, and even lead to the digital camera can not operate. There are magnetic field lines near the camera can not be the object, such as motors, transformers, speakers, magnets, etc., because the camera is very sensitive to magnetic fields, not only those, that is, radio, TV antenna also make the camera image warping intake, preferably not close. 9, anti-inert to avoid a continuous, lasting, fixed to her body under strong light, especially the strong contrast between light and dark body, such as night lighting, otherwise, the photosensitive camera tube target will be the main location of the bright leave If this happens, the camera should be allowed to rest a few days, the general is expected to recover within a week. Long camera when not in operation at least every 6 months 1 times, each time power 2 to 3 hours. 10, anti-X-ray do not put the camera on the radio waves or x-ray activity area, as this will damage both the lens and electronic components. Routine maintenance of digital cameras in addition to their own life manufacturing considerations, the key lies in maintenance. In order to keep the camera in good working condition, long life, must be carefully maintained, nice framing device, pay attention to the use of power, to: earthquake, frost, heat, moisture, dust and so on. Maintenance is one thing, pay attention to the proper use of protection is also crucial. Sometimes wonderful moments that make digital photographers s heart, but the bad natural conditions so that they had to Despair. Now, you just know some effective protective measures can not miss the photo shoot. Here we talk about the maintenance and protection of digital cameras. 1. Digital camera lenses for digital cameras, the most time-consuming job is on the framing device of the cleaning work. In particular, to keep the lens and the LCD screen clean. The first criterion is to clean the lens only when it is in great need of cleaning, a little bit of dust will not affect the image quality. When you need cleaning, it shall use a soft brush, such as the Sable system brush or hair dryer to remove dust. If you want to wipe the lens, you should use the pump to blow away the dust, wipe it with lens paper, or dust may scratch the lens there, heartache is too late; fingerprints on the lens damage is huge, it should be as fast as possible to be removed when not in use the lens must remember to clean the lens cover to reduce the number of cover. 2. Different temperature maintenance of digital cameras do not let your camera directly exposed to high temperatures, we must avoid the sun, the weather was particularly cold, you should take the camera to keep it on the coat and the temperature, the camera from a cold place into a warm place, in order to prevent condensation, should put the camera on the plastic bag or wrapped in newspaper, the temperature rise until the camera ... ... At the same time, water, fog, dust, ash, shock, anti-strike and other issues should always pay attention. 3. The camera's power supply problems now, digital cameras, mainly * battery power, but if you are using does not match or do not pay attention to save the battery, the battery will not take you exhausted after a few pictures, and when You find that when they are depleted, you have to replace the (nickel-cadmium batteries must pay attention to its storage memory problems). How to extend battery life do, here are some ways to extend battery life: 4.SmartMedia into the box to avoid scratches is to use Compact Flash if so, will not have to worry about it. SmartMedia interface is that the exposed metal to scratch is not difficult, but the card itself too thin, easily broken, the safety is on the box or the camera. 5. For mirrors to be fast, to prevent dust fool digital camera is basically a sealed, not particularly to avoid the dust, high-end interchangeable lens camera, have to always guard against. The removal of lens, CCD as long as a speck of dust stained, all photos will be annihilated at any time. Thus, this type of camera, lens must be fast changing. 6. Cellophane tape security camera display with most of the liquid crystal display monitor, it may not be easy to glue some of the fingerprints or other stains wipe, then to just use a piece of cloth and gently wipe the lens on the line. If the fear of the digital camera LCD screen will be scratched or shooting stick above the oil, you can use transparent stickers affixed PDA, which also has some common problem is not with the capture card, how to export DV video DV to USB output between video and sound is included. A random video camera software, the DV video shot recorded. Process is: 1, DV driver installed on your computer. 2, the DV and the computer USB cable connection. 3, install a video camera packages, such as: 4, play in the DV, in the I shot 36 minutes of video, into the computer is 683MB in avi files. DV is the meaning of the nickname the other stars of Hong Kong star Louis Koo in the blog's name inside. Because DV is the abbreviation of Darth Vader, he likes <Star Wars between the high voltage control, in the form: physical, ######ual, verbal, and or mental abuse or threats, abuse, often using economic abuse, isolation isolation, intimidation and other means to threaten to put pressure on the other side. Deluge Valve DV - deluge valve spray valve used to do an offshore oil and gas production facilities in emergency fire fighting equipment. Digital voltage source referred to in the same circuit, if both of the digital circuits and analog circuits, so that their power supply must be DV (digital supply) and AV (analog power) separated. Atlas Atlas entry for more extended reading: 1
routing and switching TCP / IP
2
http://dv.pconline.com.cn/
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